راه اندازی روش Real-time PCR برای تشخیص و تعیین کمی ویروس سرخک با استفاده از ژن F
محورهای موضوعی : میکروب شناسی مولکولیطاهره زارعی 1 , خسرو آقاییپور 2 , فرشید کفیلزاده 3 , عبدالحمید شوشتری 4
1 - دانشگاه آزاد اسلامی، واحد جهرم، گروه میکروبیولوژی
2 - موسسه تحقیقات واکسن و سرم سازی رازی کرج، بخش بیوتکنولوژی
3 - دانشگاه آزاد اسلامی، واحد جهرم، گروه میکروبیولوژی
4 - موسسه تحقیقات واکسن و سرم سازی رازی کرج، بخش تحقیق و تشخیص بیماریهای طیور
کلید واژه: Real-time PCR, ویروس سرخک, ژن F,
چکیده مقاله :
سابقه و هدف: با وجود کنترل بیماری سرخک در جهان، اما گزارشهایی از ابتلا به این ویروس در جمعیتهای واکسینه شده وجود دارد. بنابراین تشخیص دقیق و بهموقع این ویروس ضروری است. روشهای جدید مولکولی در تشخیص ویروس ارائه شده است که توان تعیین مقدار این ویروس را ندارند. هدف از این پژوهش راه اندازی روش Real-time PCR با استفاده از ژن F ویروس سرخک میباشد. مواد و روشها: این مطالعه با طراحی دو پرایمر و یک پروب راه اندازی و از ژن F کلون شده در داخل پلاسمید pET-22b(+) استفاده گردید. رقتهای متوالی در مبنای 10 از پلاسمید استاندارد حاوی ژن آماده شد و منحنی استاندارد رسم گردید. جهت انجام پروژه از کیت Taq Man ساخت شرکت ABI استفاده گردید. یافتهها: حداقل 30 ذره ویروسی در هر واکنش مشخص گردید و در محدوده رقتهای 4-10تا 9- 10 معادل ( 101×3- 106×3) نسخه بهترین حالت خطی برای منحنی استاندارد دیده شد. نتیجه گیری: نتایج نشان داد که تکنیک Real-time PCR میتواند به عنوان روشی بسیار اختصاصی و سریع برای تشخیص و تعیین تعداد ویروس سرخک از نمونههای حاوی این ویروس بهکار رود.
Background and objective: Although measles disease has controlled measles disease worldwide, there are some reports of the viral infection in vaccinated populations. Therefore, accurate and timely diagnosis is essential for the virus. Most of new molecular methods for virus detection cannot quantify the virus load. The purpose of this study was to set up Real-time PCR method using measles virus F gene. Materials and methods: Firstly, two primers and a probe from the F gene cloned into plasmid pET-22b (+)(Novagen) were designed. A ten fold serial dilution of standard plasmid containing the gene was prepared and a standard curve was plotted .The project was carried out on the 7500 Real-Time PCR detection System (Applied Biosystems) with Taq man kit (Applied Biosystems). Result: At least 30 viral particles per reaction could be determined and the dilutions between 10-4 to 10-9 equivalent 3×101 to 3×106 copies of the standard curve) were linear at best. Conclusion: Real-time PCR results showed that the technique can be used as highly specific and rapid method to detect and to determine the number of measles viral particles from the samples containing the virus.
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